P1497 - FAULT CODE - OBD2

P1497 KIA: EGR STEPPER MOTOR MALFUNCTION

P1497 MAZDA: EGR VALVE MOTOR COIL 2 OPEN OR SHORT

P1497 SUBARU: EGR SIGNAL LINE 3 HIGH CIRCUIT

In order to reduce the number of harmful gases that an engine expels into the atmosphere, manufacturers employ various strategies or systems. Among the major pollutants produced by vehicles is NOx, a compound that is produced in the combustion chamber once nitrogen and oxygen reach high temperatures. To reduce as many emissions of this pollutant as possible, the Exhaust Gas Recirculation System (EGR) is used.

Included in the EGR is a valve that controls the passage of the gases. This valve opens and closes according to conditions and thus allows or denies the passage of gases. The system valve is monitored by the PCM (Powertrain Control Module) employing a sensor that detects the elevation, a value that is previously stored in the controller.

When the P1497 OBDII diagnostic code is set on certain vehicles, it is due to a problem in the EGR system. Since it is a manufacturer-specific code, it is recommended to consult the source of information.

• Check Engine light illumination.
• Difficulty starting the engine.
• Unstable idle speed.
• Fuel consumption increases.

The reasons for storing the DTC P1497 OBD2 code are as follows:

• Electrical components (wires and connectors) related to the EGR System valve may be damaged.
• The EGR valve circuit may have poor electrical connections.
• The Exhaust Gas Recirculation System valve may be defective.

The steps to troubleshoot the P1497 OBDII fault code are:

• Start the diagnosis by consulting the Technical Service Bulletins.
• Inspect all connectors and cables related to the EGR valve and check that they are in optimal conditions for proper operation. Repair or replace if obvious deficiencies are detected.
• Measure the EGR valve circuit voltages and verify that these values do not indicate an open or shorted circuit. If actual readings differ from those specified, make appropriate corrections.
• Check that the Exhaust Gas Recirculation System valve is in good condition. To determine if it is defective, follow the manufacturer's diagnostic steps and if obvious damage is discovered, make corrections.